54781591373 has 2 divisors, whose sum is σ = 54781591374. Its totient is φ = 54781591372.

The previous prime is 54781591321. The next prime is 54781591439. The reversal of 54781591373 is 37319518745.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50878215844 + 3903375529 = 225562^2 + 62477^2 .

It is a cyclic number.

It is not a de Polignac number, because 54781591373 - 2⁶ = 54781591309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54781591303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27390795686 + 27390795687.

It is an arithmetic number, because the mean of its divisors is an integer number (27390795687).

Almost surely, 2^54781591373 is an apocalyptic number.

It is an amenable number.

54781591373 is a deficient number, since it is larger than the sum of its proper divisors (1).

54781591373 is an equidigital number, since it uses as much as digits as its factorization.

54781591373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 53.

The spelling of 54781591373 in words is "fifty-four billion, seven hundred eighty-one million, five hundred ninety-one thousand, three hundred seventy-three".